A Plasma, Magnetorotational Instability Experiment

Details A Plasma, Magnetorotational Instability Experiment A Plasma, Magnetorotational Instability Experiment

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aps..dppbp8113c&link_type=abstract

American Physical Society, 49th Annual Meeting of the Division of Plasma Physics, November 12-16, 2007, abstract #BP8.113

Physics

Plasma Physics

Scientific paper

A new experiment is underway at the University of Wisconsin to investigate the magnetorotational instability in a plasma. Magnetorotational instability (MRI) is a likely mechanism that could account for the observed accretion rates in astrophysical objects. The instability occurs when a weak magnetic field is present, so that tension in perturbed field lines transfers angular momentum outward while mass moves towards the center. In the Plasma Dynamo Experiment Prototype, a cylindrical, axisymmetric, ring cusp confinement geometry is used to produce a large unmagnetized plasma, confined by a highly localized magnetic field at the plasma boundary. The plasma is stirred by a novel axisymmetric electrode set that can control the rotation (angular momentum profile). The feasibility of observing the MRI will be discussed and initial results from a protoype experiment will be presented.

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